Calculate the mass (in g) of solute needed to prepare a solution with the given concentration and volume.

a. Sea water has a concentration of approximately 0.60 M sodium chloride. How much sodium chloride is dissolved in 1.00 L of solution

b. Coke has a concentration of 0.342 M. What mass of sugar (in g) is dissolved in a 2-L bottle of coke?

46 or u could use it helps alot

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol